6lowpan applications sometimes need to include application-specific information in layer 2 packets that are intended to be processed as 6lowpan packets. This document specifies a way to include this information in a 6lowpan packet in such a way that it can be ignored by implementations that don't care for it. $Id: draft-bormann-6lowpan-ext-hdr.xml,v 1.5 2008/07/02 06:23:58 cabo Exp $